PLACAS MUNDIALMENTE
Begins with map of world topography and oceans with plate boundaries, 2) arrows representing plate vectors appear.
PLACA 3
1) Begins with close-up of mid-ocean ridge with topography, 2) normal and reverse magnetic stripes appear, 3) arrows appear showing which stripes are normal, then arrows show which stripes are reversed.
PLACA TECTONICA 2
) Begins with close-up of mid-ocean ridge showing normal and reverse stripes, 2) magma rises, and stripes move away from ridge. Good companion for ridge topography version
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